Thigh root cramp, is the root of the thigh muscle uncontrollably appear persistent, intense muscle spasm, which leads to the part of the muscle pain and dysfunction. The common causes of thigh cramps are as follows: 1, long-term chronic strain injury and acute injury, can lead to muscle damage, resulting in abnormal muscle function, leading to persistent muscle spasms, cramps. 2, the muscle’s internal and external environment, the stimulation of physical and chemical factors, muscle spasms, such as cold will lead to persistent muscle spasms, calcium deficiency, that is, the lack of calcium ions in the internal environment, can also lead to muscle dysfunction due to the lack of ions. The lack of calcium, that is, the lack of calcium ions in the internal environment, will also lead to muscle dysfunction due to the lack of ions, which will lead to spasms and cramps.3. Nerve and muscle disorders, including lumbar spine disorders. Abnormalities in the nerves and muscle joints can also lead to abnormal discharges, which can lead to muscle contraction, inability to relax, and persistent spasmodic cramps. This situation can be localized massage, you can touch and feel the hardened muscle belly, massage, hot compresses, the symptoms can be relieved in a short period of time. If the symptoms of cramps continue to attack, it is necessary to go to the hospital for examination.